I believe that we should play using the tools provided by the game developers. Otherwise, we may reach extremes, such as "a winning strategy has been found, so there is no need to play the battle; let the plugin do everything for us."
Also, misclicks are much more likely during accelerated combat, especially over a considerable distance. Few people are capable of clicking in the same sequence without making mistakes thousands of times.
I feel like writing a huge, detailed text that proves you are wrong, but, to potentially save time, I will ask the following first:
Do you play with the HD mod? Do you split units into groups of one using Ctrl or "manually"? Do you exchange items and units between heroes with one click through the HD mod or "manually," spending an extra minute on this process? Do you put on/take off items on a hero using Alt or "manually"? If the answer to the first question is "yes," then you are already using "tools not provided by the game developers."